JupyterLab Server sits between JupyterLab and Jupyter Server, and provides a set of REST API handlers and utilities that are used by JupyterLab. It is a separate project in order to accommodate creating JupyterLab-like applications from a more limited scope.

This package provides the IPython kernel for Jupyter.

Jupyter Events enables Jupyter Python Applications (e.g. Jupyter Server, JupyterLab Server, JupyterHub, etc.) to emit events—structured data describing things happening inside the application. Other software (e.g. client applications like JupyterLab) can listen and respond to these events.

This package provides a hatch plugin to help build Jupyter packages.

This package opens a notebook, strips its output, and writes the outputless version to the original file.

This package provides a Tornado websocket backend for the term.js Javascript terminal emulator library.

GNU Kawa is an implementation of the Scheme programming language that is built on top of the Java platform. It is thus conveniently integrated with Java and benefits from this by having a compiler, optional static typing, and so on. Kawa also serves as a framework for implementing other programming languages on the Java platform. Included in Kawa is qexo, a partial implementation of XQuery in Java.

LabPlot is a tool for interactive graphing and analysis of scientific data. It provides an easy way to create, manage and edit plots and to perform data analysis.

This package provides a QtQuick plugin to render beautiful and interactive charts.

Gcompris offers a large collection of educational games for small children, designed to be a unified interface to integrate more educational games. Language-oriented games contain vocabulary, sounds, and voices for many different languages. Currently available boards include:

1. learning how to use a mouse and keyboard

2. learning simple arithmetic

3. learning how to read an analog clock

4. recognize letters after hearing their names

5. reading practice

6. small games (memory games, jigsaw puzzles, ...)

KAlgebra is a calculator that lets you plot different types of 2D and 3D functions and to calculate easy (and not so easy) calculations, such as addition, trigonometric functions or derivatives.

KTouch is an aid for learning how to type with speed and accuracy. It provides a sample text to type and indicates which fingers should be used for each key. A collection of lessons are included for a wide range of different languages and keyboard layouts, and typing statistics are used to dynamically adjust the level of difficulty.

Analitza is a library to work with mathematical objects. It adds mathematical features to your program, such as symbolic computations and some numerical methods; for instance the library can parse mathematical expressions and let you evaluate and draw them.

Marble is similar to a desktop globe. At closer scale it becomes a world atlas, while OpenStreetMap takes the user to street level. It supports searching for places of interest, viewing Wikipedia articles, creating routes by drag and drop and more.

Framework Integration is a set of plugins responsible for better integration of Qt applications when running on a KDE Plasma workspace.

This library provides access to and handling of calendar data. It supports the standard formats iCalendar and vCalendar and the group scheduling standard iTIP.

A calendar contains information like incidences (events, to-dos, journals), alarms, time zones, and other useful information. This API provides access to that calendar information via well known calendar formats iCalendar (or iCal) and the older vCalendar.

Provided are action classes that can be added to toolbars or menus, a wide range of widgets for selecting characters, fonts, colors, actions, dates and times, or MIME types, as well as platform-aware dialogs for configuration pages, message boxes, and password requests.

This framework helps implement autocompletion in Qt-based applications. It provides a set of completion-ready widgets, or can be integrated it into your application's other widgets.

This framework contains an interface to KWallet, a safe desktop-wide storage for passwords and the kwalletd daemon used to safely store the passwords on KDE work spaces.

KCoreAddons provides classes built on top of QtCore to perform various tasks such as manipulating mime types, autosaving files, creating backup files, generating random sequences, performing text manipulations such as macro replacement, accessing user information and many more.

As the names suggest they implement a Client respectively a Server API for the Wayland protocol. The API is Qt-styled removing the needs to interact with a for a Qt developer uncomfortable low-level C-API. For example the callback mechanism from the Wayland API is replaced by signals, data types are adjusted to be what a Qt developer expects - two arguments of int are represented by a QPoint or a QSize.

KJobWIdgets provides widgets for showing progress of asynchronous jobs.

KItemModels provides the following models:

1. KBreadcrumbSelectionModel - Selects the parents of selected items to create breadcrumbs.

2. KCheckableProxyModel - Adds a checkable capability to a source model.

3. KConcatenateRowsProxyModel - Concatenates rows from multiple source models.

4. KDescendantsProxyModel - Proxy Model for restructuring a Tree into a list.

5. KExtraColumnsProxyModel - Adds columns after existing columns.

6. KLinkItemSelectionModel - Share a selection in multiple views which do not have the same source model.

7. KModelIndexProxyMapper - Mapping of indexes and selections through proxy models.

8. KRearrangeColumnsProxyModel - Can reorder and hide columns from the source model.

9. KRecursiveFilterProxyModel - Recursive filtering of models.

10. KSelectionProxyModel - A Proxy Model which presents a subset of its source model to observers

KService provides a plugin framework for handling desktop services. Services can be applications or libraries. They can be bound to MIME types or handled by application specific code.